Home / 31,029.76-42,829.88-18,290.36

Finding the Fourth Proportional to 31,029.76, 42,829.88 and 18,290.36

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Solution

The fourth proportional to 31,029.76, 42,829.88 and 18,290.36 is: 25,245.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,029.76 : 42,829.88 = 18,290.36 : x
  2. Step 2: Convert to fraction form
    31,029.76/42,829.88 = 18,290.36/x
  3. Step 3: Cross multiply
    31,029.76x = 42,829.88 × 18,290.36
  4. Step 4: Simplify right side
    31,029.76x = 783,373,923.96
  5. Step 5: Solve for x
    x = 783,373,923.96/31,029.76
  6. Step 6: Final answer
    x = 25,245.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.